Question 1159583

if she uses {{{6 }}}cups of flour to bake {{{40}}} muffins, with {{{1}}} cup  she can bake {{{40/6=20/3}}} muffins

if she has {{{15}}} cups she can bake {{{15(20/3)=5*20=100}}} muffins

or this way:

{{{40/6=x/15}}}
{{{40*15=6x}}}
{{{600=6x}}}
{{{x=100}}}